lh28f320bfhe-pbtlez Sharp Microelectronics of the Americas, lh28f320bfhe-pbtlez Datasheet - Page 47

• Manufacturer Part Number: lh28f320bfhe-pbtlez
• Description: Flash Memory 32mbit 2mbitx16
• Manufacturer: Sharp Microelectronics of the Americas

A-3 STATUS REGISTER READ OPERATIONS
status register bit SR.15 instead of SR.7 to determine when the erase or program operation has been completed.
If AC timing for reading the status register described in specifications is not satisfied, a system processor can check the
SR.15 = WRITE STATE MACHINE STATUS: (DQ
SR.7 = WRITE STATE MACHINE STATUS
( Partition 0 )
( Partition 0 )
( Partition 1 )
( Partition 1 )
( Partition 2 )
( Partition 2 )
( Partition 3 )
( Partition 3 )
1 = Ready in All Partitions
0 = Busy in Any Partition
1 = Ready in the Addressed Partition
0 = Busy in the Addressed Partition
SR.15
SR.15
SR.15
SR.15
DQ
SR.7
SR.7
SR.7
SR.7
FOR EACH PARTITION: (DQ
Address
WE#
15-0
CE#
(D/Q)
(R)
(R)
(R)
(R)
(R)
(R)
(R)
(R)
(W)
(A)
(E)
Check SR.15 instead of
SR.7 in Partition 0
V
V
V
V
V
V
V
"1"
"0"
"1"
"0"
"1"
"0"
"1"
"0"
"1"
"0"
"1"
"0"
"1"
"0"
"1"
"0"
V
IH
IH
IH
IH
IL
IL
IL
IL
within PARTITION 0
VALID ADDRESS
Table A-3-1. Status Register Definition (SR.15 and SR.7)
Figure A-3-1. Example of Checking the Status Register
COMMAND
(In this example, the device contains four partitions.)
Operation to Partition 0
VALID
7
)
PARTITION3
t
WHR0
(t
15
EHR0
)
)
PARTITION2
Machine). If SR.15="0", erase or program operation is in
progress in any partition.
erase or program operation is in progress in the addressed
partition. Even if the SR.7 is "1", the WSM may be
occupied by the other partition.
SR.15 indicates the status of WSM (Write State
SR.7 indicates the status of the partition. If SR.7="0",
PARTITION1
within PARTITION 2
VALID ADDRESS
COMMAND
PARTITION0
Operation to Partition 2
VALID
NOTES:
t
WHR0
Check SR.15 instead of
SR.7 in Partition 2
(t
EHR0
)
021211
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